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Introduction to Linux - A Hands on Guide

This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.

So every X time my sub.domain.net-file get updated by new file from server with some new machines.

I want to add some machines to this sub.domain, but if i add to this file in some hours the sub.domain.net-slave file is overwritten by master DNS. I dont have permissions to the master DNS server (who sends me the sub.domain.net-slave file...)

There is any way to add a new zone or modify this zone to search first at a sub.domain.net-master file where i add my machines?

at sub.domain.net-master file i add my new machines.

i tryed to do something like this, but doesn't work. This solution only find the machines described at the first zone. the second zone always is ignored...

You can't hijack a zone that you don't own. If the master name server delegated a sub-domain to you, you could create your own master zone for that sub-domain, but you can't arbitrarily add names to a zone for which you're not the master.

I have some machines that 1 want to add to a DNS. I don't have the authority to add them.

# premises

- Everybody uses a DNS-server1 that is the master.
- My group of machines uses a DNS-server2 that is slave of DNS-server1.
- My group of machines uses a subnet 1.2.3.xxx -- subdomain: sub.domain.net
- The names I want to add, only must be resolved by machines of my subnet that uses DNS-server2
- DNS-server1 doesn't need to resolve names because everybody machines don't need to.

- There is a zone owned by master called sub.domain.net that resolves some ip of this subdomain

- I want to add a new zone or do something to the DNS-server2 (which I admin an i can create zones) to resolve ip and names of my subnet.

There is any way to make a zone to check 2 files? Check a file and if no match, find at other file?

As chort mentioned in his reply - In order for you to meet your stated requirements, you're only option is to have the primary DNS server delegate SOA for sub.domain.net to your name server. Then you could add/delete records for the sub.domain.net zone.

If the "group of machines" will query your "slave" server for information about the zone, then I suppose you could just set it to be type master.
This way your server will not pick up information from the "real" master any more and your clients will see your zone entries.